html,
body{
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}
html,
body,
#app{
    height: 100%;
}

textarea{
    border: none;
    outline: none;
}
button{
    border: none;
    outline: none;
}
a{
    text-decoration: none;
    color: #333;
}
li{
    list-style-type: none;
}